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Astronomers discovered a small moon in orbit of Polymele asteroid, one of the targets of the space probe Lucy. The spacecraft is set to fly through the system in 5 years.
(7335) 1989 JA is the biggest asteroid that will visit Earth’s vicinity this year. It will pass Earth safely on Friday. In the closest point it will still be 10 times further than the Moon. The asteroid is estimated to be 1,8 km across (1,1 miles).
Unusually big comet C/2014 UN271 (also called Bernardinelli-Bernstein) is coming to the inner solar system from the Oort cloud. Analysis of its orbit shows that the perihelion (furthest point from the Sun) could be as far as 7 144 AU. In 2031 it should come at the closest point to the Sun - to about 11 AU. Astronomers currently estimate size of C/2014 UN271 to be about 200 km across.
Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.